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                uva4409 - Ironman Race in Treeland                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：64MB</p>			</div>
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                                <h3>题目描述</h3><p><p>河蟹国的道路特别有特点，每一条道路上都有许多景点供游客观赏，同时每条路要经过都要付一定的钱。而河蟹国的特点就是任意两个城市之间有切仅有一条简单路径，这样使游客旅行方便了许多。 XL准备在河蟹市进行一次旅行，他可以从任意一个城市出发，经过不重复的一些路径之后结束他的旅程。但是他带的钱有限，所以他希望知道在最好情况下自己最多能够得到多少欢乐值。 当然，这个欢乐值可能为0&mdash;&mdash;没有任何一个他喜欢并且可以去的景点，所以他就世界回家看仙剑3去了。</p></p><hr/><h3>输入格式</h3><p><div>第一行三个整数N M K，分别表示河蟹国的城市数，道路数和XL身上所带的钱的数量。&nbsp;</div>
<div>接着有M行，每行4个整数Ai Bi COSTi VALi，分别表示第i-1条路径连接着Ai,Bi两个城市，经过它需要付COSTi元钱并且得到VALi的欢乐值。</div>
<div>N&le;30000，M&le;30000*30000，K&le;10^9</div>
<div>0&le;COSTi&le;1000；0&le;VALi&le;1000&nbsp;</div>
<div></div></p><hr/><h3>输出格式</h3><p><p>输出文件仅一行一个整数，表示XL在最好的情况下能够得到的欢乐值是多少。</p></p><hr/><h3>样例输入</h3><pre>4 3 2
1 2 1 1
1 3 1 2
1 4 2 3</pre><hr/><h3>样例输出</h3><pre>3</pre><hr/><h3>提示</h3><p><p>ACM/ICPC 2008吉隆坡赛区</p></p><hr/><h3>题目来源</h3><p>鸣谢刘汝佳先生授权使用</p>
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